.fab {
    position: fixed;
    display: flex;
    right: 1rem;
    bottom: 1rem;
    /* -webkit-user-select: none;
    user-select: none; */
    width: 3rem;
    height: 3rem;
    background: #EEEEEE;
    border-radius: 50%;
    box-shadow: 0 0 5px rgba(0, 0, 0, 0.3);
    transition: 0.2s opacity ease-in-out;
    -webkit-transition: 0.2s opacity ease-in-out;
    border: 0;
    overflow: hidden;
    z-index: 9;
    justify-content: center;
    align-items: center
}

.fab-up {
    animation:fab_up_anim 0.1s;
    bottom: 2.2rem;
    visibility: visible;
}

.fab-down {
    animation:fab_down_anim 0.1s;
    bottom: 1rem;
    visibility: visible;
}

.fab-hidden {
    visibility: hidden;
}

.fab:active {
    background: #e6e6e6;
}

.fab-img {
    width: 2rem;
    width: 2rem;
    border-radius: 50%;
    border: 0;
}

@keyframes fab_up_anim {
    0% {
        background: #EEEEEE;
        right: 1rem;
        bottom: 1rem;
    }
    100% {
        background: #EEEEEE;
        right: 1rem;
        bottom: 2.3rem;
    }
}

@keyframes fab_down_anim {
    0% {
        background: #EEEEEE;
        right: 1rem;
        bottom: 2.3rem;
    }
    100% {
        background: #EEEEEE;
        right: 1rem;
        bottom: 1rem;
    }
}